A lot of forum members have asked how to make a glass stand with PVC 1/2" SC 40. Here is a short video and diagram detailing how. Also, Delta Kits offers a complete practice glass package which consists of a glass stand, bulls-eye maker, star breaker, and a 20x20 piece of laminated glass. For more information please call into Delta Kits.
Picked up a peice of pratice glass when i got home from training earlier this year 22 X 32 for 10 bucks from a glass company here in town. Was looking for a 18X18 peice, but he had this peice left over from a job so basically i got 2 peices for less than price of one peice of glass
But in hind sight i would recomend smaller peices just incase you get a wild and nasty crack out you will still have another one to pratice on.